Granted Patent
Utility
US 4,634,237 · App. 06/624,694
Zoom lens
Inventors:
Yasuhiro Aono, Yasuo Yonezawa
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Jun 26, 1984
Inventors
Yasuhiro Aono
Yasuo Yonezawa
Assignee (at issue)
Nippon Kogaku K.K.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.